IDK if this is a simple mistake or a recurring mistake, what's up with the name like "undefined". Sounds like pretty damn shitty programming
I signed up before there was an option for entering the names and that's why I got email with " Hello underfined ", Now since there is an option for typing your name, you will get email with your name on it if you type it. " underfined " is just a default name ( word ) when you don't type your name during the registration.